Telautographic apparatus.



G. S; TIFFANY. TELAUTOGRAPHIC APPARATUS. v jAPPLlCATlONFlLED FEB. 24.I912. RENEWED DEC-Il', 19171 1,272,874.. Patented July 16, 1918... v 6SHEETS-SHEET 1.

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G. S. TIFFANY.

TELAUTOGRAPHIC APPARATUS. MPELlCATlON FILED FEB. 24. 1 9 2; 1 72,874.

EE NEWED'DEC- 1.,1917'.

Patented July 16, 1918.

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G. S, TIFFANY.

TELAUTOGRAPHIC APPARATUS, JAPPLICA'TION FILED FEB. 24, 1912. "RENEWEDDEC- 119'1! v 1,272,874. Patented July '16, 1918.

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TELAUTOGRAPHIC APPARATUS.

A| Puc T|0N FILED us. 24, 1912. 'RENEWED DEC. 1 1911;

1,272, 74, v Patented July 16, 1918.

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- TELAUTOGRAPHICAPPARATUS. -A|fPLlCATION -FlLED FEB. 24. 1912. RENEWEDDE C- 1 ($311 1 272,874. Patented July 16, 1918.

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GEORGE STEELE TIFFANY, OF SUMMIT, NEW JERSEY, ASSIGNOR TOG-RAY NATIONALTELAUTOGRAPI-I COMPANY, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

TELAUTOGRAPHIC APPARATUS.

v Specification of Letters Patent. Patented July 16, 1918.

Application filed Februar 24, 1912, Serial No. 679,598.- RenewedDecember 1, 1917. Serial No. 2o5,0oe.

To all whomjt may-concern:

Be it known that I, GEORGE S. TIFFANY, a

citizen of the United States, residing at Summit, county of Union, andState of New Jersey,have invented certain new and useful Improvements inTelautographic Apparatus, fully described and represented in thefollowing specification and the accompanyingdrawings,'forming a part ofthe same. This invention relates" to improvements in telautographs, andparticularly telautographs of the variable current strength type such asshown and described, for example, in

Letters Patent ofthe United States No.

954,150, granted to me April 5, 1910; the invention having reference tovarious features of the telautographic system there shown, which will be.hereinafter specifically referred to and pointed'out in the claims.

In the accompanying drawings Figure 1 is a diagrammatic view of astation, shown, for convenience, in transmitting condition.

Fig. 2 is a like view of another station, shown, for-convenience, asreceiving from the station illustrated in Fig. 1.

Fig. 3 is a plan view of the transmitting instrument with the casingthereof in section.

Fig. 4 is a front elevation of the same partly in section.

Fig. 5 is a longitudinal vertical section of the same on the line .5 ofFig. 3.

Fig. 6 is a vertical section on the line 6 of Fig. 5.. p

Figs. 7 8, 9 are details of a unison switch mechanism controllingtheoperation of an '16 of Fig. 15.

electrically operated master switch. Fig. 10 is a detail of a lampsignal device provided at each station.

Figs. 11 and 12 are details of the master switch just referred to.

Fig. 13 is a front elevation of the receiving. instrument with thecasing thereof partly in section. p

Fig. 14 is a horizontal section of the sameon the line 14. of Fig. 13..

Fig. 15 is a vertical-side elevation of the receiving instrument withthe casing thereof in section.

Fig. 16 is a horizontal section on' the line Fig. 17 is a detail, partlyin section, of!

one of the pen moving coil .of the receiving instrument and some of theconnections between it and the receiving pen.

F 1g. 18' is a detail in section showing the connection between one ofthe pen moving in its unison position.

Fig. 21 is a detail, in section, of a relay I and a pair of relativelyloose contacts controlled thereby, which latter, in turn, control thepen moving mechanism of the receiving instrument.

Flg. 22 1s a detail, partly in section, of the magnet of the papershifting mechanism at the receiving instrument.

Fig. 23 is a detail means for automatically making and breaking'a signalcircuit from one station ,to another. Y

Each station comprises a transmitter instrument, hereinafter called atransmitter, and a receiving instrument, hereinafter called a receiver,indicated at the left andright, respectively, of each of the twodiagrammatic Figs. 1 and. 2. In the number, relative arrangement andconstruction and operation of'parts, one station is the counterpart ofthe other. Therefore, in the following description, references will bemade to either station, according as convenience intracing circuits maydictate. As the parts in two stations are identical, correspondingreference numerals will be used in both, followed, however, in Fig. 2,for convenience of description, by the reference letter a.

Each transmitter comprises a pair of rheo-' stats 1, :2, included in anormally open local circuit, from a source of electric energy, forexample a motor generator,3, the negative pole of which is grounded at1,- this local current-supplying circuit being controlled by a masterswitch, designated 5 as a whole, which will be hereinafter fullydescribed.

This local circuit, when closed (Fig. 1), that is to say,'-when thestation is transmitting, consists of wire 6 from the positive brush ofthe generator, .astationary contact 7 a movable contact 8,wire 9, wire10, wires 11,

to right rheostat 1, wires '12, 13, 14, to left rheostat 2, and wires15, 16 from right rheoa stat 1, and wires 17, 1 8,16 from left rheo'-'enerator 3. In the normal or receiving position of a stastat 2, to thenegative pole of I tion, its generator .3 serves simply, as a v5 sourceof energy for local circuits, herein- 1 after describedfln 1ts ownreceiver, whilein the transmitting position of .a station, its generatorserves as a source of energy for the main line tracing circults to thedistant '10 receiver and its .own receiver and also as a 7 source ofenergy for local circuits in the latter. Coacting with rheostats 1, 2,respectively, are two roller contacts 19, 20, earned -by arms 21, .22,respectively, through which currents. are shunted'ffrom generator '3into right and left tracer main lines, res ectively,

leading, as usual, to the right and; eft-sides of the distant receiver,andalsounto right I and left I local tracer'lines leading'to the I '20right and left sides of the local recelver.

It will be obvious that when the local circuit just referred to fromgenerator 3 is closed, the currents shunted therefrom into the rightand'left main lines and local lines lead- 'ing to the distant receiverand to the local receiver, respectively, will vary .in strength inaccordance with the positions, from time to time-,- o f the rollercontacts 19, 20, length- .Wise of the rheostats 1, 2,.respect1ve1y,these contacts being so moved along .the rheostats,

-1, 2, by, and in accordance with the lateral or tracing movements of,'-the transmitting tracer 23. This tracer 23 is, as usual, and as Ibestshown in Figs. 3, 4, 5,6, mounted in the converging ends of a pair ofrods 24, 25, the opposite ends of which are pivotally connected withtheout'er ends of arms 26, 27,

'the inner. ends of which are in turn pivotally mounted to swinghorizontally onposts i 40. 28 secured to a slab 29 of slate or othersuitable insulating material mounted on the base 30' of the transmittercasing 31, on

a which slab are also, mounted all the other my said Patent No. 954,150;and therefore description thereof is rents of varying strength shuntedinto the main linetracercircuits'to" the distant receiver, and into thelocalt-racer circuits to I the local receiver, will, as in my said pat-"6 0 ent, produce, through devices at the respective receivers which willpresently be de scribed-,lateralmovements of the receiving pens 33. and33,- respe'c'tively, corespond- 'ing in extent'and direction to thelateral" 65 movements of the tracer 23 so that they will tion, asthey'are shown. scription will be as applicable to thetwo stations,Figs. 1 and 2, if their conditions,

. 8, formin 'foredescrlbed from generator 3 and includ- -as-in Fig. '1with stationary contacts 7,43

unnecessary. I Of 55' course, itwill be understood that the curreproduceon the usual paper record strip 34, 34, respectively, the writingproduced at the transmitter by the tracer 23 upon the paper record strip35.

The permanent main line tracer circuits from a transmitter to a distantreceiver comprise (for the right line) movable contact 36, wires 37, 38,39 (Fig.1), wires 39, 38 37 and movable contact361 (Fig. 2), and (forthe left line) movable contact 40, wires 41, 42 (Fig. 1)'-, wires 42,41, and movable contact (Fig. 2). These circuits, as thus made up, areused for trans mitting to or receiving from a distant station, accordingto the, positions, controlled .by. master switch 5, of theirmovablecontacts 36, 40, relatively to apair of stationary contacts 43,44, and-a second pair of sta-. tionary contacts 45, 46. When thecontacts 36, 40 engage the contacts 46*, as in Fig, 2, which illustratesa station in its normal position, the two main line circuits referred toare used for receiving. from the distant-station (Fig. 1). When,however, .the

contacts 36, 40 engage the contacts 43, 44,

as in Fig. 1, these main line circuits are used "for transmitting to thedistant station, and also as part of the local rightand left tracerlines leading from the transmitter .to its own receiver. This will allbe clear from the description, which will now be given, of the completef'right and left line circuits from generator 3,'of Fig. 1., throughthereceiver of Fig.-2,;as'suming the station of Fig. 1 to be intransmitting condition and the station of Fig. 2 to be in receivinornormal posiff course, this dejust assumed, be reversed.

It may be noted here that, when contacts 36, 40, are moved into and outof engagei ment with stationary contacts '43, 44, the con tact 8,heretofore referred to, is also moved by the master switch 5 into andout of en gagement with the stationary contact 7,

heretofore referred to; these two contacts 7 part of the local circuithereto station (Fig.2), by the engagement, at. the .stat on (Flg. 1), ofcontacts 36,40, with contacts 43, 44, 'respectively:' for the rightline, roller contact 19,. arm 21-, wire 47, one secondary wlndmg 48 ofan induction coil 49, wire 50, contacts 43, 36, .Wires 37, 38, 39, (Fig.1), Wll'BS' 39, 38 37, contacts 36,

45, wire 51, right hand-relay 52*, wire 53*, right hand coil 54, movablerectilinearly in a magnetic field hereinafter described and which isexcited by generator 3*, and wires 55*, 56 and 16, to ground at 4 (Fig.2)

, and, for the left line, roller contact 20, arm

22, wire 57, the other secondary winding 58 Y of induction coil 49, wire59, contacts 44, 40,

2). With these circuits thus closed, the two right and left-line tracercircuits, from the transmitter of Fig. 1 through the local receiver ofthat station, are also closed, so that any message transmitted tothe-distant receiver (Fig. 2) will also be recorded in fac-' simile atthe local receiver. Thesev local tracer circuitsare the same as thosejust described for the right and left line tracer circuits to thedistant receiver, up to and including part of the wires 37, 41,respectively. l hence the right local. circuit is negative pole ofgenerator 3.

. traced by wire 66, containing a resistance 67,

whichis approximately equal. 'to that met with on the corresponding orright main line to the distant receiver, wire 51, right relay 52, wire53, coil 54, and wires 55, 56, and 16 to ground at 4; while for the leftline the circuit is traced by wire 68, containing a resistance 69,contact 46, wire 60, left relay 61, wire 62, "coil 63, and wires 64, 65,and 16 to As the transmitting tracer23 of Fig. 1 is moved laterally inwriting, the roller contacts 19, 20 will be moved along the rheostats 1,2, and as they are thus moved currents varying in strength, inaccordance with the direction and extent of theirmovements, will beshunted into the right and left main line circuits to the distantreceiver, and also into the similar circuits to the local receiver, withthe result that the coils 54 63 of the former, and the coils 54, 63, ofthe latter, will be moved rectilinearly, more or less, in accordancewith the strength of such currents, and, in turn, through connectionswhich will presently be described, efl'ect lateral movements of thereceiving pens 33 33, respectively, corresponding in direction andextent to those of the transmitting tracer 23. Further description ofthis operation is deemed unnecessary,

' as it is generally the same as that of the system shown'and. describedin my aforesaid Patent No. 954,150, although in some im-- portantrespects, which will be pointed out, the devices in the receiver foreffecting these movements of the receiving pen in the present case, andparticularly the coils 54, 63,

,and their adjuncts, are materially different a from those of my saidpatent,

In my said prior Patent No. 954,150, as Well as in all othertelautographs of that discovered may be overcome by mounting them, as inthe present case, so as to move horizontally in the manner now to be described.

The coils 54, 63, which, with their connections, are shown in detail inFigs. 14, .15, 16, 17, move in a horizontal direction, in a magneticfield provided by a magnet 70.

supported in horizontal brackets 71 secured to a slab of slate mountedon the base of the receiving instrument. The coils 54, 63 are inclosedby the magnet pole pieces 270, and are slidably mounted on the magnetcore 73. Preferably, the core 73 is provided with a longitudinal groove74, and the coils 54, 63 with rollers 7 5 entering this frame, for thepurpose of guiding and reducing frictional resistance to movement of thecoils. Each of the coils 54, 63, is provided with ayoke .7 6 adapted toengage hooks 77 on a chain 78 resting upon and connected at its lowerend with a segment 79 fixed to a shaft 80 journaled in ears projectingfrom a bracket 81 secured to a magnet core 73. The hooks 77 of chain 78are of such width as to provide a broad bearing engagement with yoke 76so as to prevent lateral rocking 100 of the latter. Coiled springs 82(one for each coil 54, 63) tend to move shafts 80 in a'counter-clockwise direction and to nor mally, through segments 79, holdthe coils in their normal positions; each spring being 105 connected atits inner end with a collar 83 fixed to its shaft 80 and near itsopposite end, with a clamping device 84 fixed to one of the ears ofbracket 81, in which the shaft 80 is journaled, spring 82 beingadjustable lengthwise relatively to this clamping device so thatitstension may be increasedor de- {adjustably mounted arms 89, 90, having.

stops 91 for engaging the pen arms 87, 88,

and accurately positioning them and receiving pen 33 in unison with thepoint of the latter in line with the opening in the usual ink bottleshown in Fig. 13. V

/ In the receiving condition of a station the magnetic field in whichits coils 54, 63 or 54, 63* move, while a distant station istransmitting messages to it, is excited by the generator 3 or 3 of the.station so receiving, while. the magnetic field for the coils of thereceiver .of the station transmitting is excited by the generator ofthat station, which enerator is also su plying.

I current to the rlght and left lines. eading from it" to the distantreceiver and from its transmitterto its own receiver. v

The circuits from the generators". for so exciting the se magneticfields will now be described. L

fore dealt with as transmitting tothe station Fig. 2, the -localcircuits from generator3 q of the latter for exciting the magnetic fieldof coils 54 63 will first be referred to. [In this condition of the tWo.stations it will be remembered that contacts 8, 36, 40 of Fig. 1 engagecontacts 17; 43, 44 of that figure, whilecontact's 8*, 36 40 of Fig. 2

' are. disengaged from-contacts 7, 43*, 44

' contacts 36",40 being then in engagement with contacts 45?, 46 Thelocal circuit in such case for exciting the magnetic field of coils'5463 in Fig. 2 consists of wirev 6" from positive pole of generator 3?,contact i wires 92 93,lock magnet 94 of a unison switch grouphereinafter described, wires 95 96 97, 98 I99, windings 100, .101 offield magnet 70; wires 1023-103 104 spfing contact 105., mounted on butinsulated from 3 armature, 106 of left hand relay 61, con-.

tactj107 andwires 108 65 ,16 to the.

negative. pole of generator-3. This circuit is opened and closed at agiven station, as

Fig. 2, at thecontacts 105", 107%., and is only closed when anotherstation, as Fig. 1, is transmitting and current is therefore on the leftmain line, comprisingwires 4 42*, from the generator?) of such otherstation,

- -relay 61*. being then energized and attract- 0 mg its armature 106whichmoves contact 105 into engagement with contact 107 A like circuitis also closed at the-same time. c. from generator3 of'the transmittingstation through magnet70 ofxthe receiver of that 5 station. In view ofthe descriptions of operatlons which have been given from time totimeup. to this point, the operation of the system asthus far describedneed only be briefly stated. Still assuming Fig; l to be transmitting toFig. 2,, relays 52, 61.? of Fig. 2 and 52, 61 of Fig. 1. will beenergized by the current from generator 3, and the armatures 106, 106'of relays 61, 61 will thus move] contacts .105, 105 into engagement withcon tacts 107, 107 of the respective recelvers and thus close theldeahci-rcuits, just described,

As the station (Fig. 1) has been-hereto .43, 44, respectively,transmitting tracer 23 2'and the local tracer circuits to the receiver.of Fig. 1. Such currents, acting in opposi- "tion to springs 82, willause the coils 54, 5

63 of Fig. 2, and 54, 63 of Fig. 1, to mbveto the right (FigsAl and 2)varying dis tances, according-to the strength, from time to time, of thecurrents traversing said main and local-tracer lines. The coils so movedY w1ll, through the. connections before described, move the receivingpens 33f, 33, respectiyely, laterally, to the same extent and the samedirection as transmitting tracer 23 is moved, thus producing in the tworeceivers the same writing produced in' the transmitting station bytracer 23. When the 'transmitting operation isiended, the station (Fig;

1) which has been transmitting is restored to normal orreceiving'position by 'disengage ment of its'contacts 8, 36, 40 fromcontacts 7,

being restored .to its unison. position Fig. 2.'

There being, no current. on the main .tracer lines or the local tracerline's, coils54 63, I and 54, 63 are then moved to the left, to

normal position, and receiving pens 33, 9 0" 33, then restored to normalor unison pcsitions,;by the springs 82, each receiving pen in its normalpositlon being in line with the openingin the ink bottle of itsreceiver.

t The; system as thus far described provides merely'for the lateralmovements of the receivlng pen. (Provision is also made, of

course, .for its movement to and from. the writing surface and in andout of the ink bottle opening. The means provided-for 7 this'urposecompri'ses'a pen-lifting magnet lbest shown in Fig.19), includedin a local circuit in the receiver which is a branch of the field magnetcircuitheretofore described. The description'which will now be given ofthis local circuit is as ap plicable to Fig. 1 as to Fig. 2incconnection with which it will be specifically described forconvenience, as that is receiving and Fig.

1 is transmitting. It is traced asfollows: 110

wire 6 from positive pole of generator .3 contact 7*, wires 92, 93,magnet 94, wlres I 111,- pen-lifting magnet 110, wire 112,

loose contact group 113, controlled by a pen-lifter relay 114*, I ashereinafter d'escribedywires 115, 104%, contacts 10?, 107?, andwires108', a-nd'16, to the negatlve' pole? of generator 3, this circuitbein closed at.

contacts 195, 107, when current 1n the left Y,

tracer line and relay 61 theretofore ener-- giz'ed, the armature 106 ofthe relay then effecting engagement of-these contacts,- as in the caseof the field magnet'circuit. In other -wo'rds, continuing thedescription with special reference to- .Fig. 2, when-currentis on ,themain line the local receiver circuits for the field magnet an 'thepen-lifting magnet are both closed by the left handrelay 61', and durinthe closed condition of the penlifting circuit the pen-lifting magnet110 is, at'times, energized, and, at times, in effect denergized,depending on the condition, relatively to each other, of the loosecontact group 113 hereinafter described. When deenergized its pivotallymounted armature 116*, Fig. 2 (and 116, Figs. 16 and 19'), is

swung rearwardly by'a spring indicated at 117 in Figs. 16 and 19,connected at one end with the magnet frame 118 (see Figs. 16, 19) and atits other end with a rod 119 Fig. 2 carried by the armature and in'turncarrying a pen rest 120, so that said pen rest is withdrawn fromengagement with the pen arms 87, 88*. These pen arms then move inwardlytoward the receiver platen (shown at 121 in the detail view Fig. 19) sothat the receiving pen 33 carried by them will rest against therecordstrip 34 or in the bottle opening, depending on the lateral position ofthe receiving pen. When the magnet 119 is energized its armature 116 andpen rest 120 are swung outwardly with the result that the latter willmove pen arms 87, 88 away from receiving platen 121, and the receivingpen 33* out of contact with the record strip or out of the bottleopening, as the case may be. ward movements of the receiving pen 33 takeplace simultaneously with like move-- ments of the transmitting tracer,which controls such movements of the receiving ,pen 33" through a platenswitch 125 in the same manner now to be described.

The loose contact group 113*, forming part of the pen-lifting circuitjust described, con

sists, as in my said Patent No. 954,150, of a pair of contacts 126, 127(see Fig. 21') in-.

closed by a hermetically closed tube 128 and loosely engaging eachother, so that one may have a slight amount of play-relatively to theother. So long as their engagement is uninterrupted the local circuitfor pen-lifting magnet '110 is' undisturbed and said magnet remainssufliciently energized to at. tract its armature and hold pen arms 87,88% and receiving pen 33 in their outward position, that is, with thepen out of the writing plane or out of the bottle opening. Rapidvibration, however, of the onecontact rela-. tively to the other willproduce such a condition of interruption in the circuit of the penlifter magnet 110 that the latter, during the continuance of suchinterruptions, is, in effect, de'e'nergized so that it will release itsarmature 116", with the result that receiving pen 33 will move intocontact with the paper or'into the bottle opening, as described in mysaid patent. The relative condition of the contacts 126, 1.27, iscontrolled by platen switch 125 at the transmitter as follows: Thetransmitter is provided with a short circuiting buzzer129, which in thetransmitting condition of a station, for example 1, is included in abranch of the These inward and outlocal current-supplying circuit, atthe transmitter, which, in the transmitting condition of the station, isclosed at the contacts 7, 8, from positive pole of generator 3, asbefore pointed out, this circuit passing thence by wires 9, 10, 11 torheo'stat 1, and by wires 12, 13, 14, 15 to rheostat 2. This branchcircuit for buzzer 129 comprises wires 130 leading from wire 12, andwhence the circuit takes two paths, one consisting of wires 131, 132,133, primary Winding 134 of induction coil 49, wires 135, 136, (thelatter including a resistance 137) and wire 138 to the negativevpole ofgenerator 3, and the other consisting of wire 139, buzzer 129, wires140, 141, 142,.and wires 136, 138, to the negative pole of generator 3.This two part branchcircuit is normally, and also while the transmittingtracer 23 is in araised position, during a receiving operation, shuntedout of circuit with the current-supplying circuit from generator 3, by ashunt circuit consisting of wire 143, from wire 12 of the currentand thetwo part branch circuit including buzzer 129 and induction coil primarywinding 134 electrically connected with the current-supplying circuit.WVhile so connectedcurrent will pass over the two parts of this branchcircuit, the one including buzzer 129 7 and the other primary inductioncoil winding 134. That passing over the former will energize the buzzermagnet 129, whose armature 146 will then engage a contact 147 and I forma shunt, by wires 130, 131, 148, contact 147, armature 146, andwire's141, 142, 136, 138, around magnet 129 and primary winding 134. Current.passing through magnet 129 will then fall until it reaches a point wherearmature 146 is released and withdrawn from contact 147 by its spring,when the circuits through magnet 129 and primary winding 134 will bereestablished.

.Armature 146- will then again be attracted and engaged with contact147, thereby again short-circuiting magnet 129, and primary winding 134,and so on, so long as-platen switch 125 is depressed out of engagementwith contact 144. The vibration in this way of armature 146. causespulsatory currentsto traverse the'primary winding 134 of the inductioncoil '49, which in turn induce 'corresponding vibrations in thesecondary windings 48, 58 of the induction coil, as well as in thecurrents traversing the right and left tracer lines to the distantreceiver and the right and left tracer lines to the local receiver,which right and left lines, it will be remembered, include thesewindings 48,

the circuit heretofore described through I 58, respectively. Thesevibrations'on the inwardly toward the platen.

are vibrated relatively to each other so as to repeate'dly interrupt and.in' effect open pen-lifting mag-,net 110, whose armature 116, and pen.rest 120 carried thereby, will be withdrawn from pen-supporting positionand the receiving pen 33 thereupon move Like movements of thereceiving-pen 33 in the local receiver are effected by *the'pen-liftingrelay 114 therein,simultaneously with those of the;

receiving pen 33 on thedistant receiver.

To summarize briefly the operations just,

described, so long as the transmitting tracer 23 is raised from thewriting platen 109,

platen switch 125 occupies the raised position in which it is shown inFig. 1, in engagement with contact 144. Buzzer magnet j 129 and primarywinding 134 of induction "coil 49 are'thus short-circuited and no vi-'brations are induced in the main lines to the distantyand localreceivers. The loose contacts 126*,127 and 126, 127 in tubes 128 I and128 are therefore undisturbed and penlifter magnets 110, and 110 remainenergized, with their armatures 116 and pen rests 120?,120 thrusting thereceiving pens 33 33 away from their writing platens, which is theposition then of the transmitting tracer 23 relatively to its writingplaten 109. While writing platen 109 is depressed by tracer-23 or thehand of the operator, platen switch 125 is disengaged from contact 144.Magnet 129 and primary coil 34 are then in circuit and there areproduced in the manner just described vibrations in the right and lefttracer lines which disturb the engagement of the relatively loosecontacts 126 127 and 126 and 127- in the tubes 128, 128 of the tworeceivers, interrupting, and in effect opening, the circuit through thepen lifter magnets 110, so that the pen rests120, 120 of the tworeceivers will be withdrawn from pen-supporting position and thereceiving pens 33, 33 thus moved into contact with the record strips inthe respective receivers, a position which they will retain so long asthe writing platen at the transmitting instrument is depressed.

' It may be noted here that a resistance 15.2

is shunted around the pen-lifter magnet 110 for the purposeof'diminishing the spark at' the relatively loose contacts 126, 127,affording a path for the discharge current of said magnet.

Each transmitter is provided with a paper shifter, as a whole designated155 in Fig. 1

and 155*"-in Fig, 2, and each receiver is provided with a similar papershifter designated 156 in Fig. 1 and 156 in Fig. 2. A description of theshifters at one station will be 'suffi'cient, those of Fig. 1 beingselected for such 'descri tion.

Before des'cri ing the paper shifter at the transmitter Fig. 1 (shownbest in Figs. 3, 4,

5, 6), itshould be noted that the paper strip 35 thereis in the form ofa roll the core-157 of. which rests in journals provided in brackets 158secured to the slab 29 and extending outwardly from the front end of thetransmitter casing 31; these brackets also carrying a rod159 which ispivotally mounted in the brackets, and' on which the writing platen109is mounted by arms 160 secured to the front end of the platen. Thepaper strip 35is-led from the supply roll through a guideway 161 at thefront end of the .casing, thence over writing platen 109, which also haspaper-guides 162-, and finally out through a slit 1% at the rear end ofthe casing. Beyond the platen 109, is provided the paper-shiftingmechanism,'wh1ch comprises a reciprocating paper-clamping deviceconsisting of a lower bar 164 over which the strip 35 passes, and aparallel pair of upper gization of magnet 168 and the attraction andrearward movement of its armature 167, and when so moved it clamps thepaper strip, between bar 164 and the bars 165, 166, an "moves itrearward one step so as to bring a fresh portion of the strip into thefield of Writing over platen 109. moved in the opposite or forwarddirection, when magnet 168-is'deenergized, by a It, is

spring 170 which then moves armature 167 in that direction. When magnet168 is thus deenergized bars 165, 166 are released from the pull of thearmature 167, and, therefore,

move upwardly and away from the paper s'trl 35, which, during theforward or non-' fee ing movement of the clamping device, is thereforereleased from the grip of these bars. Restoration of bars 165, 166'totheir upper position, in such case, is insured by the provision of alight spring connection between their adjacent ends.

The construction and method of operation of the paper-shifting devicesin the 10- cal receiver and in the distant transmitter and receiver arethe same as that just described, except that, the receiverin each casebeing vertical, the paper-shifting mecha- 1 'nism is arranged to feedthe paper strip vertically instead of horizontally. For convenience,however, in following the circuits, the paper shifter magnet of thelocal receiver (Fig. 1) is designated .17 2 the two corresponding papershifting magnets of the transmitter and receiver of the distant station(Fig. 2) being designated 168, 17 respectively.

In the case of the paper-shifter magnet 168 of the transmitter of thestation transmitting, Fig. 1, energization thereof is effected fromgenerator 3 by a circuit which is traced as follows: wire 6, from theposi, tive pole of generator 3, contacts 7, 8, wires 9, 172,paper-shifter magnet 168, wires 173, 174, to the negative pole ofgenerator 3.

The circuit for the paper-shifter magnet 172 of the receiver (selectingFig. 2 as that is receiving from Fig. 1), is a branch of the localcircuit, heretofore described, for exciting the magnetic field of thereceiver, and is traced, from wire 96*" of that circuit, leading fromthe positive pole of generator 3, by wire 175 to magnet 172 thence bywire 17 6 to the polarizing winding of the pen-lifter relay 114 andthence by wires 177, 115 104 contacts 105*, 107 and wires 108, 65 and16?, to the negative pole of generator 3 The circuit for the paper-ishifter magnet 172 of the receiver of the station transmitting, Fig. 1,is traced in the same way from generator 3.

It will be understood, of course, that the paper-shifter magnets 168 ofthe transmitter (Fig. 1) 1720f the local receiver, and 172 of thedistant receiver, Fig. 2, are all ener-j gized, and the paper strips 35of the trans-' mitter and 34 of both receivers are fed forward one step,on the closing of the tracer line circuits from said transmitter to thedistant and local circuits by the movement of the-contacts 8, 36, 40into engagement with stationary contacts 7, 43, 44, respectively, and itwill also beunderstood that in order to move these record strips forwarda number of steps immediately following each other, all that theoperator need do is to .move contactsv 8, 36, 40, into and out ofengagement with contacts 7, 43,44, a number of times equal to the numberof steps he wishes to move the strips. .It may also be noted here thatas the paper strip 35 or 34 leaves the transmitter or receiver casing itmay be torn off or wound up on a spring-I operated take-up reel 179.

The master switch 5 heretofore referred to, and which controls movablecontacts 8, 36, 40, will now be described, and in connection with itcertain parts of the unison switch group, designated 180 as a whole,which control its operation. This master 7 switch (shown in detail inFigs. 11, 12) .comprises an electro-magnet 181, hereinafter referred to,the armature 182 of'which carriesthe three contacts 8, 36, 40,heretofore referred to. Normally this magnet is deenergized and itsarmature 182 therefore occupying the position in which it is shown inFig. 2, that is to say, with contact 8 out of engagement with stationarycontact 7 and contacts 36, 40 out of engagement with contacts 43, 44,and in engagement with contacts 45, 46, as in said Fig. 2. This, asbefore stated, is the normal condition of each station and in suchcondition the station is ready to receive but not to transmit, thetransmitter being out of circuit with generator 3 as well as with theright and left lines to the distant station and to its own receiver, asindicated in that part of the description which has already been givenof the circuits as they exist when one station is transmitting to theother.

Master switch magnet 181 of Fig. 1 is'included in a local circuitconsisting of wire 6, from positive; brush of generator 3, contact 7,wires 92, 182, a pair of movable contacts 183, 184, wire 185, magnet181, and wires 186, 174, 138 to the negative brush of generator 3.Normally this circuit is open, at the contacts 183, 184, as shown inFig. 2, where the station is shown as in normal or receiving position.When, however, a station is transmitting this circuit is closed, asshown in Fig. 1, so that magnet 181 will It-1 tract its armature 182 andthrough it, move contacts 8, 36, 40, into and hold them in engagementwith contacts 7, 43, 44. The making and breaking of this circuit at eachstation is controlled by the operator at that station, through thefollowing devices (shown in detail in Figs. 7, 8, 9): Contact spring 183just referred to is secured to, but insulated from, a bracket 186mounted on slab 29. A bell crank lever 187 pivotally mounted in ears 188in an upper lateral extension 189 of said bracket with its vertical armsengaging contact spring 183 and its horizontal arm engaged by a push pin190 resting. in a notch therein and provided with a stem 191 projectingupwardly through a slot in a latch plate 192 and also with a button 193projecting upwardly through a similar slot in lateral extension 189 ofbracket 186 alongside of and in substantially the same horizontal planewith the writing platen 109 of the transmitter. The tendency of springplate 183 is to hold contact183 away from and out of engagement withcontact 184, which is also secured to and suitably insulated frombracket 186. To cause such engagement, however, all that'is necessary tobe done is for the operator in charge of the station to depress stem190, by engagement for example of the transmitting tracer 23 with button193, and thereby rock bell crank lever 187, and through it move springplate 183 inwardly so that contact 183 carried thereby will engagecontact 184. This closes the circuit just described through switch.,magnet 181 and effects the engagement of.

contacts 8, 36, 40 with stationary contacts 7, 43, 44, as in- Fig. 1; orin other words,

changes the station from normal or receiving condition to transmittingcondition, in which condition it continues until the engagementofcontacts 183, 184 1s broken,

. when the stationreturns to receiving or normal condition. Provision ismade for locking these contacts 183, 184 in engagement,

- consisting of ashoulder or catch 194 which 95 of said magnet, asfollows, contact 7 by wire 92' to wire 93 and contact 195 by ,wire 196to wire 95. k The closing of the local switch magnet circuit justdescribed by the depression of key stem 190 and engagement of contacts-183, 184, and consequent closing of the main tracer lines to the distantstation, as Fig. 2,) results in energization of the lock magnet 94" atthe distant station because it. is included in, for example, the localcircuit at that station for exciting the magnetic field thereof,'whichcircuit it will be remembered is closed by the attraction of armature106 by left relay 61 and consequent engagement of contacts 105 107Magnet 94 (see Fig.

7), thus energized, will attract its armature 200 which has pivotallyconnected to it a loc'king bar201 that then passes under the horizontalarm of bell crank 187 to prevent downward. movement thereof. Operationof the unison switch 180* at. the distant stationis therefore preventedso long as the other station is transmitting, the transmitter parts atthe former being locked in unison position. Armature 200, and itspivoted locking bar 201, are held normally in retracted position by aspring 202.

It might sometimes happen that the unison switches180, 180 of bothstations would be operated practicallysimultaneously and this wouldresult in confusionand delay in' determining which station should haveprec edence in transmitting to the other. It

will be found, however, in such cases, that while the dual operation isapparently si- 'ultaneous, one really precedes the other slightly, andthe station at which this occurs 1s of course the one entitled to firstwriting current is online.

signalto be from the station transmit. This situation is taken care ofin the present case by the provision (Figs. 7 8,,

9) of the pivoted connection. between the locking bar 201 and armature200 of magnet 94, and the provision further of a rod 203 carried by aspring plate 204 attached 'at one end to bracket 186, this rod being inline with armature 200. From this construction it results that if in thecase assumed the at the other, the operator at the former will obtainthe line for transmitting to thelatter because the magnet 94 at hisstation hasbeen short-circuited and the local circuits at thedistant'station closed through mag net 94 by energi'zation of relay 61,as before described, so that magnet 94 will be energized and attract itsarmature 200, which through rod 203 will disengage contact 183 fromcontact184 and open the" circuit of switch magnet181 contacts 8,

36 40 then returning to normal position with contacts 36, 40 inengagement with contacts 45, 46. This will occur even though meanwhiledownward movement of the key stem 190 of the unison switch 180 at thedistant station has been completed.

Means are also provided in the present case for calling or signalingfrom one station to the other. With this in View each' station 1sprovided with a signal buzzer 210, 210

which is operated by switch 211, 211, re-

spectively, at the distant station, when no I Fig. 1 to the statlon Fig.2, the C1 IClllt over which the call or signal is sent consists of 'wire6 from positive pole of generator 3, wire 212, resistance 213, springcontact 2 14, stationary ggntact 215, wire 216, right main line wire37*, contacts 36:, .45, wire-51 right relay 52*, wlre 53, 0011154 5 andwires 55*, 56 and 16 to'ground at 4*. Relay 52? being thus energized atwill, through its armature 205*? and forward contact 217 a close thefollowing Assuming the (Fig. 1), right main liriewires 39 38*,

local circuit in-the receiver Fig. 23 wire 6 from generator 3?, contact7*, wires 92, 93*, magnet 94 ,.wires'95 96, 97, 218, contact 219,ofsignal buzzer 210*,armature .220,

Wire 3' magnet indings of buzzer 210 wire 222 contact 223*, lever 224(which,

when magnet 70 is not excited, rests-against contact 223*), wire 2%,armaturie 205", contact 217 and wires 226, 56 and 16 to the negativepole of 'generator'3 As just in-' dicated, signals may be sent from onestation to another so long as writing currents are mot traversingthemain lines. When such is the case lever 224 rests against contact 223*.and this signal circuit may be closed at the. switch 211 (Fig. 1). Assoon as writing currents are on the main lines the tracer line,including the wire 60 in the breaking the signal circuit.

field magnet 7 0 is excited from generator 3* and lever.224 is attractedthereby, thus Each station is also provided with a busy visual signalconsisting of a lamp 230, 230 (see Fig. 10), indicating to the operatorthat his local circuits are closed, when he is transmitting, this signalbeing operated by the following circuit: wire"6 from generator 3,contacts 7, 8, wires 9, 10, 12, 13, 231, lamp 230, wire 232 includingresistance 233, and wires 18, 16to the negative pole-of generator 3.

Means are also provided i'nthe present case for; vibrating the movableparts of the distant receiver as well as the receiver of the stationtransmitting. These devices, which will now be briefly .described, donot, however, constitute any part of the present invention, the {samebeing the invention of Henry W. ONeill. The device provided for thispurpose consists of a short-circuiting buzzer 240located in thereceiver, the circuit for which istraced as follows: from wire 96, whichit will be remembered leads from the positive pole of the generator 3;

wires 96, 97, 98, 99, winding 100 of field.

magnet 70, wires 241, 242, magnet winding of buzzer 240, wires 243, 244,103, 104, spring contact 105, stationary contact 107, and wires 108, 65,and 16, to the negative pole of generator 3. Of course, it will beunderstood that this circuit is closed only when writing currentstraverse the itracer, lines to the local receiver and to the distantre-.

ceiver, such current traversingthe left case of the local receiver, andthe corresponding wire in the case of the distant receiver, energizingrelay 61in the local receiver, 61 in the distant receiver, therebyeffecting engagement of the contacts 105, 107 in the former, and 105.107 in the latter, thusclosing the buzzer circuit justv described. Ashunt consisting of wire 245, ar-

-magnetic circuit in a direction parallel to 110 mature 246 vof buzzermagnet 240, contact 247, and wire 248 is formed around the buzzer magnet240, so that when the latter is energized so as to attract its armature246, such gages contact 247, and thus the magnetic field in whichthemovable coils 54, 63 are located will be maintained in a vibratorycondition, and this vibration communicated .by the coils-5.4, 63 to theparts connected there. 65 with will maintain the whole pen-lifting groupin ,a state of vibration, thereby greatly diminishing friction in theseparts.

Reference has heretofore been made to the spring contact 105 of the leftrelay 61 as being carried by the armature 106 nF. th t lay, the two, asshown, being insulated from each other, and the armature 106 beingprovided with a contact 250, which, in the-deenergized condition ofrelay 61, will engage the contact 105, this occurring, of course, whenno writing currents traverse the main lines. The object of thisconstruction is to short-circuit the'winding 101 of field magnet 70,connected by wires 102, 103,104 with contact 105, so as to cause themagnetism is shunted by wire 252 around the field magnet winding andserves as a path for the discharge current of that magnet. What I claimis: v 1. In a'telautographic system, the combination,twith main linetracer circuitsfrom the transmitter to the receiver, a'transmitter 1 0tracer, a receiving-pen, a magnetic circuit at the receiver-comprising apair of core pieces,

end yokes in contact with one core piece, said end yokes having holesthrough whlch .the other core piece-extends loosely to form a gap ateach end of the said core piece, and means for energizing sald magneticc1rcu1t,

' of coils surrounding the latter core piece, and

each movable in the respective gap in the the transmitter to thereceiver, a transmitter 12 tracer, a receiving pen, a magnetic circuitat the receiver comprising a pair of core pieces, end yokes in contactwith one corepiece, said end yokeshaving holes through which the othercore piece extends loosely to form a gap at each end of the said corepiece, and means for energizing said magnetic circuit, of coilssurrounding. the latter core piece,

' and each movable in the respective gap in 4 the -magnetic circuit in adirection parallel to the axis of the core piece which said coilssurround, sa1d coils being lncluded 1n the mam l1ne clrcults, a supportfor each 0011, an

antifriction connection between each coil and its support to permitmovements of the coil, and connections-between said coils and thereceiving pen for effecting lateral movement thereof in accordancewiththe lateral movements of the transmitting tracer, substantially asdescribed.

' 3. In a telautographic system, the combination of main line tracercircuits from the transmitter to the receiver, a transmitting I tracerand a receiving pen, asuitable magnetic field in the receiver, suitablysupported.

coils having a horizontal rectilinear movement therein, an anti-frictionconnection between each co1l and 1ts support conslsting of r a roller onthe former and a groove in the latter for easing such movement of thecoil, and connections between said coils and the receiving pen forefl'ectin' lateral movement thereof in accordance wit the lateralmovements of the transmitting tracer, substanv tially as described.

4. In a telautographic system, the combination of main line tracercircuits from the transmitter to the receiver, a transmitting tracer anda receiving pen, a suitable magneticfield in the receiver, suitablysupported coils having a horizontal retilinear movement therein, andconnections between said coils and the receiving pen for efiectinglateral movement thereof inaccordance with the lateral movements of thetransmitting tracer, said connections for eaclf'coil including apivotally mounted sector device and a broad-bearing connection betweenit and the i coil preventing la'teral rocking of the coil,

substantially as described.

5. In a telautographic system, the combination of main line tracercircuits, from the transmitter to the receiver, a transmitting tracerand a receiving pen, a suitable magnetic field in the receiver, suitablysupported coils having a horizontal rectilinearmovement therein, andconnections between said coils and the receiving pen for effectinglateral movement thereof in accordance with the lateral movements of-thetransmitting tracer, said connections for each coil including apivotally mounted; sector device provided with a chain having abroad-bearing link connection between it and the coil presaid end yokeshaving holes through which the axis of'the core piece which said coilssurround, said coils being included in the main line circuits, andconnections between said coils and the receiving pen for effectinglateral movement thereof in accordance with the lateral movements of thetransmitting tracer, said connections foreach, coil including .apivotally mounted sector device and means adjustably connecting with thecoil, substantially as described.

7. In atelautographic system, the combination-{with mainlme tracerclrcuits from the transmitter to the receiver, a transmitter tracer, areceiving pen, a magnetic circuit'at the receiver comprising a pair ofcore pieces, end yokes in contact with one core piece, said endyokeshaving holes through which the other core piece extends loosely to forma'gap at each end of the said core piece, and means for energizing saidmagnetic circuit, of coils surrounding the latter core piece, and eachmovable in the respective gap in the magnetic circuit in a directionparallel to the axle of the core piece which said coils surround,saidcoils being included in the main line circuits, and connectionsbetween said coils and the recei'ving pen for effecting lateral movementthereof in accordance with the lateral movements of the transmittingtracer, said connections for each coil including a pivotally mountedsector device and a link adjustably connecting it with the coil,substantially as described. 8. In a telautographic system, the00minnation, with main line tracer circuits from the transmitter to thereceiver, a transmltter tracer, a receiving pen, a magnetic circuit atthe receiver comprising a pair of core pieces, end yokes in contact withone core piece, said end yokes having holes through which the other corepiece extends loosely to form a gap at each end of the said core piece,and means for-energizing said magnetic circuit, of coils surrounding thelatter core piece, and each movable in the respective gap 1n themagnetic circuit in a direction parallel to the axis of the core piecewhich said coils surround, said coils being included in the main linecircuits, and connections between said coils and the receiving pen foreffecting lateral movement thereof in accordance with the lateralmovements of the transmitting tracer, said connections for .each coilincluding a pivotally mounted shaft connected with the coil and rotatedthereby in one direction, and provided with I an adjustably mounted coilspring for movper-gripping device, an electro-magnet and circuittherefor for operating it, and means controlled by the operator formaking and breaking said circuit, said paper-shifting device mcludingpaper-gripping devices of magnetizable material connected with thearmature of the magnet and gripping the paper when the'latter isenergized, substantially asdescribed.

12. Thecombination'with the transmitter and the receiver of atelautographic system,

and circuit connections between vthe same, of a rectilinearly movablepaper-shifter at the receiver, and magnetic devices and circuitconnections therefor at the receiver and controlled from the transmitterfor operating said paper shifter, substantially as described;

13. The combination with the transmitter and receiver of atelautographic system and main line tracer circuits between the two, ofa rectilinearly movable paper shifter at the receiver, and magneticdevices and circuit connections therefor at the receiver controlled fromthe transmitter through one of the tracer circuits, substantially asdescribed.

14:. In a telautographic system the combination of main line tracercircuits from'the transmitter to the receiver, a receiving pen, asuitable magn'etlc field 1n the receiver and pen-controlling membersmovable therein in accordance with the currents traversing the mainlines, and acircuit making and breakingcontact controlled by themagnetic field, substantially as described.

15. In a telautographic system the combination of main line tracercircuits from the transmitter to the receiver, a receiving pen, asuitable magnetic field in the receiver and pen-controlling membersmovable therein in accordance with the currents traversing the mainlines,'and a signal current controlled by the magnetic field,substantially as dcscribed.

16. In a telautographic system the combination of main line tracercircuits from the transmitter to the receiver, a receiving pen, asuitable magnetic field in the receiver and pen-controlling membersmovable therein in accordance with the currents traversing the mainlines, a circuit making and breaking contact controlled by the magneticfield, and a signal circuit controlled by said contact, substantially asdescribed.

17. In a telautographic system the combination of main line circuitsfrom the transmitter to the receiver, a receiving pen, a suitablemagnetic field in the receiver, a local circuit for exciting it, meanscontrolled by one of the main lines for opening and closingthis localcircuit, a signal circuit, means controlled by the other main line foropening and closing it, and a circuit making and breaking contact forthe-signal circuit, controlled by the magnetic field and moved tobreaking position when the magnetic field is excited, substantially asdescribed.

18. In a telautographic system the combination of a transmitter andreceiver at one station, a transmitter and receiver at another station,mainline tracer circuits between the two stations, an electricallyoperated switch mechanism at each transmitter for electricallyconnecting it with the receiver of the other station through said tracerlines, and switch locking means at each stationcontrolled from theotherstation whereby operation of such switch mechanism at thestationwhich is receiving is prevented, substantially as described;

19. In a telautographic system the combination of a transmitter andreceiver at one station, a transmitter and receiver at another station,main line tracer circuits between the two stations, an electricallyoperated switch mechanism at each transmitter for; electricallyconnecting it with the receiver of the other station through said Itracer lines, a local circuit for each such switch mechanism, a unisonswitchincluding manually operable circuit-closing means for said circuitand an electro-magnet provided with means for breaking said circuit, anda local circuit for the electro-magnet at each station controlled fromthe master switch of the other station, whereby on the.

switch mechanism, a unison switch including manually operablecircuit-closing means for sand circult, and an electro-magnetprooperated circuit-closing means being so ar-' ranged that when movedto closing position said magnet is out of circuit, whereby on themovement of the master switch at one station to transmitting positionthe electromagnet at that station is out of circuit, and saidelectro-magnet at the other station prevents the closing of the localswitch circuit 15 thereat, substantially as described.

In testimony whereofiI have hereunto set my hand, in the presence of twosubscribing witnesses.

GEORGE STEELE TIFFANY. Witnesses:

J. A. GRAVIlS, S. E. BROWN.

